the economy has been tough on small businesses. >> so anything we can do to help us out bring attention to our cause, if you will, is that much better. >> reporter: now, horrible small businesses do enjoy -- of course small businesses do enjoy the black friday overflow but a third of them say their biggest day of the year is small business saturday. reporting live in walnut creek, don knapp, cbs 5. >>> still no word on what caused last night's gas explosion in massachusetts. the blast leveled two buildings including a strip club. more than 40 other buildings housing residential units were damaged and three of the buildings are now condemned. 18 people were injured and mostly emergency workers. authorities say no one was killed because the area had already been evacuated after reports of a gas leak. >>> three maintenance workers were seriously hurt at a fire at the state department head quarters in washington, d.c.. it break out this morning in the duct work on the seventh floor. workers were able to put out the flames before firefighters got there. the building was evacuated and then reopened.